{"id":"CVE-2026-18690","title":"An issue in MongoDB Server could allow an authenticated user with a limited database-scoped role to perform an action against protected system collections that their assigned privileges should not permit","summary":"An issue in MongoDB Server could allow an authenticated user with a limited database-scoped role to perform an action against protected system collections that their assigned privileges should not permit. This could result in critical sy…","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","cwe":["CWE-863"],"vendor":"mongodb","product":"mongodb","affected":["mongodb >= 7.0.0, < 7.0.40","mongodb >= 8.0.0, < 8.0.29","mongodb >= 8.2.0, <= 8.2.12","mongodb >= 8.3.0, < 8.3.8","mongodb = 9.0.0","mongodb = 9.1.0"],"patched":["mongodb 8.3.8"],"published":"2026-08-11","updated":"2026-09-16","sourceUpdated":"2026-09-16T15:14:48.000","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-18690","references":[{"url":"https://jira.mongodb.org/browse/SERVER-130481","label":"cna@mongodb.com"}],"tags":["nvd"],"epss":0.00253,"epssPercentile":0.17119,"ingestedAt":"2026-08-29T19:41:15.482Z","slug":"CVE-2026-18690","body":"## Overview\n\nAn issue in MongoDB Server could allow an authenticated user with a limited database-scoped role to perform an action against protected system collections that their assigned privileges should not permit. This could result in critical system collections being dropped and recreated without proper authorization.\n\n## Affected\n\n- `mongodb >= 7.0.0, < 7.0.40`\n- `mongodb >= 8.0.0, < 8.0.29`\n- `mongodb >= 8.2.0, <= 8.2.12`\n- `mongodb >= 8.3.0, < 8.3.8`\n- `mongodb = 9.0.0`\n- `mongodb = 9.1.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `mongodb 8.3.8`","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}